Credit: Unknown

9th Street Security Gate

The Washington Navy Yard, a National Historic site on the banks of the Anacostia River in southeast Washington, D.C., isn’t exactly Fort Knox, but some security precautions for access to the base are adhered to, and “protocol can change without notice,” according to Naval History and Heritage Commmand. For instance:

The article you requested has been archived

All coverage within bostonherald.com from the last 14 days remains free of charge. Articles do not always include original photos, charts or graphics.